Critical Thinking Puzzles

Find the least number which when divided by 35, leaves remainder 25; when divided by 45, leaves remainder 35 and when divided by 55, leaves ...

I bet you for Rs. 100 that if you give me Rs. 200, I will give you Rs. 300 in return. Would you bet with me? Why?

There are N secret agents each know a different piece of secret information. They can telephone each other and exchange all the information ...

What are the next three numbers in the given series? 1 1 2 1 2 2 3 1 2 2 3 2 3 3 4 1 2 2 3 2 3 3 4 2 3 3 _ _ _ ?

If you were to dial any 7 digits on a telephone in random order, what is the probability that you will dial your own phone number? Assume th...

A sheet of paper has statements numbered from 1 to 100. Statement N says "Exactly N of the statements on this sheet are false." Ho...

A stick of length 1 metre is divided randomly into 3 parts. What is the probability that a triangle can be made with those three parts?